Psyc 210 E1 Review

A descriptive statistic does what?

• allows us to infer our results

• summarizes, organizes, and explains results

• describes the hypothesis

• operationalizes the independent variable

What kind of statistic allows a researcher to make inferences about a population of interest?

• descriptive

• inferential

A population is generally defined as what?

• the collection of all possible members of a defined group

• a subset, or smaller collection, of observations from the overall group of interest

• the entire group of interest about which we want to make conclusions

• a single number or group of numbers that organize, summarize, and communicate a group of numerical data

A variable is a(n) ...

• specific value

• whole number

• value of physical, attitudinal, or behavioral characteristics for a given interval

• observation of physical, attitudinal, or behavioral characteristics that can take on multiple values

What variables are always discrete?

• ratio and ordinal

• ratio and interval

• nominal and ordinal

• nominal and interval

An example of an ordinal variable would be ___; an example of a ratio variable are __.

• the best cookie to the worst cookie; number of cookies left

• number of cookies left; the best cookie to the worst cookie

• the name of cookies; the temperature of cookies

• the best cookie to the worst cookie; the name of cookies

Independent variables are what?

• measured and manipulated

• manipulated and observed

• measured and observed

• only observed

Dependent variables are what?

• measured and manipulated

• measured and observed

• only measured

• only manipulated

___ means it measures what it was intended to measure.

• reliability

• validity

What is an example of a reliable test?

• the Rorschach ink blot test

• taking the SAT three times and getting a 530 on the math section every time

• five people guessing my height

• a bathroom scale displaying very different results from one day to the next